Clutch, Gu thinking, is to play the role of isolation and closed. That is, the clutch of engine and wheel drive. That is to say, when you press the clutch, then the engine's drive is disconnected from the wheel, and the engine's power doesn't reach the wheel to drive the car.

When you release the clutch, then the engine will be connected with the wheel drive, power on the wheel, the car will naturally move.

The concept of clutch is clear, right?

So why separate the power from the wheel? Because of the different speed engine to speed, the problem is more complex, I will elaborate on it is ominous, different speed engine driving device todifferent speed to the wheels, playing at this time need to separate the slow gear and wheel speed and wheel gear engagement, this one will be use the clutch.

Having understood the working principle of the clutch, then combine it with practice. When your car is at the start, the wheel is still, to let the car changed to state of motion in the stationary state, then the required thrust is great, than the car in motion is larger, the clutch, hang a file, see what happens? When you step on the clutch, which is good for driving a wheel gear to first gear, the gear is slow to drive, when you loose the clutch, gear transmission gear wheel to slow the on, you carry it on fast, fast, slow you up, it depends on when the car started slowly.

If you lift the clutch quickly, then the two gear immediately engaging, because the car is stationary, need a large thrust, the engine output power is not sufficient to make the car reached a speed when the car then suddenly move, and then turn off. Car in a prescribed engine has reached the wheels, but due to overcome the force is greater than the output of the engine, it is the engine to push your car, then the gear is stuck, engine flameout.

So that's why you need to fill the door and slow the clutch at the beginning.

The engine can increase the output power of the engine, and the clutch will slow down the resistance, so that the engine can overcome the static friction and make the vehicle start smoothly. When the car is moving, the clutch can be lifted slowly and steadily, because the dynamic friction force is much smaller than the static friction of the vehicle when it is moving. That's why the clutch can lift a little faster in the two or three and four stalls without stalling.

Similarly, the small slope should be increased at the beginning of the throttle, clutch to tighten the bar is also the reason, because the uphill resistance is greater than the plane.